Sökning: WFRF:(Engelmark Cassimjee Karim)
> (2010-2014) >
Chromobacterium vio...
Chromobacterium violaceum omega-transaminase variant Trp60Cys shows increased specificity for (S)-1-phenylethylamine and 4 '-substituted acetophenones, and follows Swain-Lupton parameterisation
-
- Cassimjee, Karim Engelmark (författare)
- KTH,Biokemi
-
- Humble, Maria Svedendahl (författare)
- KTH,Biokemi
-
- Land, Henrik (författare)
- KTH,Biokemi
-
visa fler...
-
Abedi, Vahak (författare)
-
- Berglund, Per (författare)
- KTH,Biokemi
-
visa färre...
-
(creator_code:org_t)
- Royal Society of Chemistry (RSC), 2012
- 2012
- Engelska.
-
Ingår i: Organic and biomolecular chemistry. - : Royal Society of Chemistry (RSC). - 1477-0520 .- 1477-0539. ; 10:28, s. 5466-5470
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- For biocatalytic production of pharmaceutically important chiral amines the.-transaminase enzymes have proven useful. Engineering of these enzymes has to some extent been accomplished by rational design, but mostly by directed evolution. By use of a homology model a key point mutation in Chromobacterium violaceum omega-transaminase was found upon comparison with engineered variants from homologous enzymes. The variant Trp60Cys gave increased specificity for (S)-1-phenylethylamine (29-fold) and 4'-substituted acetophenones (similar to 5-fold). To further study the effect of the mutation the reaction rates were Swain-Lupton parameterised. On comparison with the wild type, reactions of the variant showed increased resonance dependence; this observation together with changed pH optimum and cofactor dependence suggests an altered reaction mechanism.
Ämnesord
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
Nyckelord
- OPTICALLY-ACTIVE AMINES; ASYMMETRIC-SYNTHESIS; CHIRAL AMINES; SUBSTRATE-SPECIFICITY; RESONANCE COMPONENTS; CHEMICAL-REACTIVITY; AMINOTRANSFERASE; SUBSTITUENT; IDENTIFICATION; BIOCATALYSIS
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas